The Nexus S ships with a 4-inch screen, which is one of the biggest you can get in a smartphone at the moment. But it turns out this isn’t the only size of screen that exists for the Nexus S device.

Jason Kincaid of TechCrunch stumbled across a much larger version at a Best Buy located in San Carlos, California. This thing is huge, sporting a 42-inch display, yet remaining full-functional as far as we can tell.

Based on the responsiveness of the screen alone I would opt for the smaller version. You also have to consider portability issues and how short of a battery life this thing will have. It’s just not workable as an everyday phone, is it?

The screen issues could be to do with the interface that has the TV Jason interacts with talking to an actual production Nexus S sitting behind it. If Google can sort that out it might make for a better user experience, but still, it’s a nice idea to get people using Android in-store.